Same-sex parents undoubtedly care for their children. They cheer for them at their kindergarten plays, comfort them in times of sorrow, and make many sacrifices for them. The same could be said of single parents, stepparents, or adoptive parents. None of this changes the fact that kids do better when they live with their own mom and dad. It seems that the only people who refuse to admit this are those who lobby for same-sex marriage. If it’s biologically necessary for men and women to cooperate in order to create children, shouldn’t we believe that both parents are equally necessary for the developmental well-being of those children?